Mainly yes. Giving up custody is not a scaling solution to Bitcoin. Calle says this himself (one of the many reasons I have the utmost respect for him).

Outside of that, I really don't think there is, or ever will be, a large appetite for people willing to become mint runners. High profile ones will be regulated into oblivion and grey market ones will be a huge rug risk to users.

What does that leave? Small knit 'community' or 'trusted' outfits like Bitcoin Beach etc where workable solutions (albeit with inferior privacy) already exist.